Percolator construction



March 15, 1932. A. F. FISHER PERCOLATOR CONSTRUCTION Filed May 19, 1931 %is A TTORNE y Patented Mar. 15, 1932 UNITED stares PATENT 'FFWE ALBERT r. FISHER, or nnmn'ron, NEW YORK, ASSIGNOR 'ro RoBnson-Roonns'rER ooR- rona'rron, or ROCHESTER, new YORK, A CORJBORATION on NEW YORK PERGOLATOR CONSTRUCTION 7 Application filed May 19, 1931. Serial No. 538,495.

This invention relates to liquid receptacles, and more particularly to coffee percolators of the class having a fragile non-metallic body portion. One of the objects of the invention 1s the provision of a percolator of this kind having a suitable resilient member which will protect the fragile body against the expansive force of the cover and the metallic ring disposed between the cover and the body. Another object of the invention is the provision of a percolator of this class which has the resilient member permanently secured to the fragile body portion.

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings Fig. 1 is an elevation view of a percolator constructed in accordance with the preferred embodiment of the invention;

Fig. 2 is a plan view of the percolator illustrated in Fig. 1;

Fig. 3 is a fragmentary vertical sectional View of the upper part of the percolator taken substantially on the line 83 of Fig. 2, and

Fig. 4 is a view of some of the parts illustrated in Fig. 3 on a larger scale so as to show the invention more clearly.

Similar reference numerals throughout the several views indicate the same parts.

The new and improved coffee percolator disclosed in the present application, by way of illustration, comprises in general a nonmetallic liquid receptacle or body portion 12 preferably of ceramic construction, such as china, porcelain, or the like, and a metallic base 13 suitably secured to the body 12 and containing the usual electrical heating unit. The body 12 is providedwith the usual top opening 14 in which a metallic ring is secured in a manner hereafter more fully described. Y V

The ring 20 is circular or of any other shape required to conform to the shape of the opening 14, and is preferably formed to provide a U-shaped channel having an outer circumferential rim 26 and a deeper concentric inner rim 27. The rim 26 is of greater diameter than the opening 14, while the-rim 27 is of less diameter than the opening; and when the ring is placed on the body 11 in the manner illustrated in Fig. 4, the rim 26 engages the bodyl2 along the'circumferential line 80, while the rim 26' is disposed'within the opening 14 and spaced concentrically from the edge thereof, as shown in Fig. 4.- Lateral movement of the ring 20 is prevented by a circumferential bead which is adja cent the edge ofthe opening 14, and which engages the inner edge of the member 26,. thus retaining the ring in proper position relative to the opening 14. 1 y

The ring is preferablyv permanently secured to the body by any suitable means, such as the cement which is disposed in the channel 25 intermediate the ring 20 andthe body 12, as clearly illustrated in Figs. 3 and 4. To prevent the loosening of the cement 40 and to assure its being retained in place in the channel 25, a suitable locking means is provided, preferably in the form of a circumferential groove 41 in the edge of the opening 14, into whichthe cement 40 is forced so as to lock it in position.

A cover, comprising a metallic portion 44 and the usual glass top 45, is disposed in the openingformed by the inner rim 27 of the ring 20 While it is contemplated that this cover maybe hingedly or otherwise secured to the ring 20 it is preferably made detachable therefrom in a manner to be presently de scribed." The metallic portion 44is provided with a circumferential depending marginal flange 50, having a slight conical taper and fitting snugly within the correspondingly tapered upper portion of the rim 27 toforma. tightjamming fit therewith which will hold the cover in place when desired, yet permit it 1 to be removed a slight up'wa'rdpull. In order to prevent the cover from being pushed downtoo far, the rim 27 is provided with a y;

circumferential rib 51 which engages the lower ed e of theflange and limits the downward movement thereof. This rib 51 also provides a groove on the rear face of the I l rim 27 which. cooperates withthej'groove 4] 1 of the metallic ring 20 and of the metallic part 44 of the cover.

Because of the tight jamming fit between the cover and the ring 20, the expansion of the cover accentuates the expansion of the ring, and if a solid, unyielding body of" cement is interposed between the ring 20 and the body 12, the eX- pansion of the ring is apt to crack the non- ,metallic and relatively fragile body.

To prevent or greatly reduce any possibility of cracking the body by this expansion, the present invention interposes a resilient member between the ring and the body, which resilient member Will yield under the force ofthe expansion and thus protect the fragile body against breakage. This resilient member is preferably in the form of a thin strip of cork 60 which is disposed concentrically in the channel 25 intermediate the edge of the opening 12 and the rim 2?, and extending the fulliheight of the latter, as illustrated in F ig. 4. This thin strip or gasket provides a continuous yieldable partition between the ring 20 and the body 12. The gasket 60 may be secured in any desired manner, but it is preferably held in place by embedding it in the cement 40, in the manner shown in Figs. 3 and 4. The use of such a resilient member provides a simple and effective means for protecting the fragile body against the likelihood of breakage by the expansion of the .over and the ring 20.

While the present embodiment discloses a resilient member in the form of a cork gasket,

this is byway of illustration only and it is contemplated that" other resilient substances maybe used without departing from the inventive idea embodied in the claims.

I claim:

1. In combination, a ceramic percolator body having an opening, a concentric metal ring adjacent the edge oi said opening, cement disposed between said ring and said body for rigidly securing said ring thereto, a cover member associated with said ring, and

a yieldable gasket embedded in said cement" intermediate said ring and the edge of said opening to reduce likelihood of breakage of said body by expansion of said ring.

2. In combination, a ceramic percolator body provided with an opening, a metal ring I disposed concentrically in said opening, said ring being'formed to provide a channel one I edge of which is spaced from the edge of said ket being yieldable under pressure to protect said body from breakage.

3. In combination, a ceramic percolator body having an opening, a metal ring disposed concentrically in said opening and spaced from the edge thereof, cement between said ring and the edge of saidopenin'g for permanently securing said ring to said body, and a thin vertical gasket of yieldable material embedded in said cementintermediate" ALBERT F. FISHER.

opening, cement disposed in said channel between said ring and said body for permanently securing said ring thereto, a cover associated with said ring, and a cork gasket dis posed concentrically in said channel and extending the full depth thereof between said edge and the edge of said opening, said gas- 

